
//--------------------------------------------------------------------------------------
// File: DDSTextureLoader.h
//
// Functions for loading a DDS texture and creating a Direct3D runtime resource for it
//
// Note these functions are useful as a light-weight runtime loader for DDS files. For
// a full-featured DDS file reader, writer, and texture processing pipeline see
// the 'Texconv' sample and the 'DirectXTex' library.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
//
// http://go.microsoft.com/fwlink/?LinkId=248926
// http://go.microsoft.com/fwlink/?LinkId=248929
//--------------------------------------------------------------------------------------

#pragma once

#include <d3d11_1.h>
#include <stdint.h>


namespace DirectX
{
	enum DDS_ALPHA_MODE
	{
		DDS_ALPHA_MODE_UNKNOWN = 0,
		DDS_ALPHA_MODE_STRAIGHT = 1,
		DDS_ALPHA_MODE_PREMULTIPLIED = 2,
		DDS_ALPHA_MODE_OPAQUE = 3,
		DDS_ALPHA_MODE_CUSTOM = 4,
	};

	// Standard version
	HRESULT CreateDDSTextureFromMemory(
		_In_ ID3D11Device* d3dDevice,
		_In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
		_In_ size_t ddsDataSize,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_In_ size_t maxsize = 0,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	HRESULT CreateDDSTextureFromFile(
		_In_ ID3D11Device* d3dDevice,
		_In_z_ const wchar_t* szFileName,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_In_ size_t maxsize = 0,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	// Standard version with optional auto-gen mipmap support
	HRESULT CreateDDSTextureFromMemory(
		_In_ ID3D11Device* d3dDevice,
		_In_opt_ ID3D11DeviceContext* d3dContext,
		_In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
		_In_ size_t ddsDataSize,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_In_ size_t maxsize = 0,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	HRESULT CreateDDSTextureFromFile(
		_In_ ID3D11Device* d3dDevice,
		_In_opt_ ID3D11DeviceContext* d3dContext,
		_In_z_ const wchar_t* szFileName,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_In_ size_t maxsize = 0,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	// Extended version
	HRESULT CreateDDSTextureFromMemoryEx(
		_In_ ID3D11Device* d3dDevice,
		_In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
		_In_ size_t ddsDataSize,
		_In_ size_t maxsize,
		_In_ D3D11_USAGE usage,
		_In_ unsigned int bindFlags,
		_In_ unsigned int cpuAccessFlags,
		_In_ unsigned int miscFlags,
		_In_ bool forceSRGB,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	HRESULT CreateDDSTextureFromFileEx(
		_In_ ID3D11Device* d3dDevice,
		_In_z_ const wchar_t* szFileName,
		_In_ size_t maxsize,
		_In_ D3D11_USAGE usage,
		_In_ unsigned int bindFlags,
		_In_ unsigned int cpuAccessFlags,
		_In_ unsigned int miscFlags,
		_In_ bool forceSRGB,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	// Extended version with optional auto-gen mipmap support
	HRESULT CreateDDSTextureFromMemoryEx(
		_In_ ID3D11Device* d3dDevice,
		_In_opt_ ID3D11DeviceContext* d3dContext,
		_In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
		_In_ size_t ddsDataSize,
		_In_ size_t maxsize,
		_In_ D3D11_USAGE usage,
		_In_ unsigned int bindFlags,
		_In_ unsigned int cpuAccessFlags,
		_In_ unsigned int miscFlags,
		_In_ bool forceSRGB,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

	HRESULT CreateDDSTextureFromFileEx(
		_In_ ID3D11Device* d3dDevice,
		_In_opt_ ID3D11DeviceContext* d3dContext,
		_In_z_ const wchar_t* szFileName,
		_In_ size_t maxsize,
		_In_ D3D11_USAGE usage,
		_In_ unsigned int bindFlags,
		_In_ unsigned int cpuAccessFlags,
		_In_ unsigned int miscFlags,
		_In_ bool forceSRGB,
		_Outptr_opt_ ID3D11Resource** texture,
		_Outptr_opt_ ID3D11ShaderResourceView** textureView,
		_Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);
}
